Handle empty apn string in setInitialAttachApn HIDL API.
am: 46e9ee36b6

Change-Id: Ie83142b6e724ce34f7ae3cddee35bbeba592fe04
tree: d8c3985c7da8f907d0b9168f7f93ac74eb0ac406
  1. include/
  2. libril/
  3. librilutils/
  4. reference-ril/
  5. rild/
  6. CleanSpec.mk
  7. OWNERS